Method of cleansing with alkali salts of protalbinic and lysalbinic acids



cm amen, on conrnnrcx, NEAR BERLIN, GERMANYQASSIGNOR, BY MESNE ASSIGNMENTS, To run CHEMICAL F OUNDATION, INC., A CORPORATION OF mn'rrronor CLEANSING WITH AIKALI SALTS or rnorALBINIc AND 'LYSALBINIC DELAWARE.

ACIDS.

1,367,007, Specification of Letters Patent.

No Drawing.

To all whom it may concern: Be it known that I, CARL BENNERT, a subject of the Emperor of Germany, and residvol. 35, page 2195.

Lysalbinic Acids,

are formed from ing at Coepenick, near Berlin, in the Empire of Germany,

have invented certain new and useful Improvements in Method of Cleansing with Alkali Salts of Protalbinic and of which the following is a specification. V

The present invention relates to a new and improved method of washing or cleansing.

It has been known for some time, that proteins of animal in a weak alkali hydrate or other caustic-acting solution are split hydrolytically by heat, so. that nitrogen in the form of ammonia is given oif and acids are produced which form salts with the alkalis. Such acids, of which the protalbinic acid and lysalbinic acid are the typical representatives have been first prepared and investigated by Paal; see Berichte der'Deutsche Chem. Gessellsckaft,

I have found, that the solutions of these different acids and their alkali salts, which I proteins accompanied by a loss of nitrogen in form of ammonia by heating the solutions of the proteins in a weak alkali hydrate or other caustic-acting solution, have more or less good washing and cleansing properties, so that they can be employed as a substitute forsoap, which they even surpass as regards protecting the textile fibers from wear and tear. That property is specially exhibited when woollen fabrics are washed or cleansed,'inasmuch as the fibers or yarns remain soft and brilliant and are moreover strongly protected 'from in'ury. 1

When using the new washing preparation the formation of froth is quite insignificant and the',good result is not attained hereby.

-For instance, the mixture of sodium caseoprotalbinate and caseo-lysalbinate obtained from casein in the manner described above is a splendid preparation for washing wool or woolen fabrics although practically no frothing takes place, tie for soapsuds. p

I In utilizing that property of the washing preparation according to the invention there is no need to separate or purify the difi'erent compounds "formed. It is only necessaryto or vegetable origin dissolved come like felt. advisable to avoid much wringing of the which is so characteris Application filed December 27, 1915. Serial No. 68,847.

neutralize the excess of alkali hydrate used by the addition of any suitable acid until the reaction is neutral with phenol-phthalein.

For some purposes it is -preferable to remove hydrate by dialysis,whereby any the alkali loss of substance is avoided, since the dialyzed substance can be used over again.

The solutions thus obtained, chiefly consisting of the derivatives of the proteins which correspond with the typical protalbinic and lysalbinic acid, may down in a vacuum and can concentrated state or dryness. s

The products can also be mixed with other known products commonly used for washing be applied in a purposes in order to modify and influence their properties. By that mixture I obtain preparations of variable properties for washing and cleansing.

I' will now explain by way of example how to clean dirty woolen goods by means of the new washing preparation. I take for 250 gr. of wpol about gr. of the neutral dry washing agent, obtained as described above and boiled down to dryness in a vacuum. That quantity of the preparation is dissolved in about one liter of water of Patented Feb. 1, 1921.

be boiled I may be'evaporated to 30to 35 C. The goods tobe cleansed are loose by allowing the goods to remain in {well soaked with that solution and allowed the strong solution. After resting for some further tlme in the liquor the goods are first rinsed with fresh lukewarm water and finally with cold water.

Scrubbing of the goods should be avoided as much as possible as otherwise they are liable to shrink and be- For the same reason it. is

goods which are preferably allowed to drain by hanging until they are perfectly dr'y.

I Hauing now described my invention, what I conslder new and wish to claim and to protect by Letters Patent of the United States 2. he method of cleansing which comprises subjecting the material to be cleansed to the action of alkali salts of caseo-protalbinic and caseo-lysalbinic acids.

3. The method of cleanslng which coniprises subjecting the material to be cleansed -to the action of sodium salts of protalbinic and lysalbinic acids.

4. The method of cleansing which comprises subjectin to the action 0% sodium salts of caseo-protalbinic and caseo-lysalbinic acids.

In testimony whereof I aflix my signature in presence of two witnesses.

CARL BENNERT. Witnesses:

HENRY HAsPER, ARTHUR SOHROEDER.

the material to be cleansed 

